Add KEY_SATELLITE_NIDD_APN_NAME

KEY_SATELLITE_NIDD_APN_NAME defines the APN being used for satellite provision.

Bug: 350387637
Test: basic voice call + data browsing
Test: integration test connect to skylo done in b/350387637#comment7
Flag: com.android.internal.telephony.flags.carrier_roaming_nb_iot_ntn

Change-Id: Ic501fbc552d8155a7e60fcdf8d1eaefaa1ace30a